**Update (8/15): I found some internal geometry that I accidentally left behind in the original models. I've updated all three so if you have problems printing your bases, try the new models. This is a set of 120mm bases. 5mm at the upper lip, 4mm at the lower. Any internal steps are 1mm. The internal radius is 108mm, should fit 120mm "round lip" style base inserts. In the game I play (Warmachine) bases of this size require that the front arc be divided into a front-left and front-right arc. The second version is just that, with a T built in marking left and right arcs. The final version has three 31mm inserts for placing models in. It's up to you why this my be useful, but the name refers to a specific Warmachine model that I will be using this base to proxy until the real thing is released (Transfinite Emergence Projector, still my favorite model name). If you want a full collection of 30mm scale bases, check out my other thing: http://www.thingiverse.com/thing:134019I highly recommend that you print this with a raft. Otherwise it will be very difficult to get off the print surface.